Vania



J. S. BAN CH OFT & M. C. INDAHL. CENTERING BAR LOOK FOR TYPE CASTING MACHINES.

APPLICATION FILED NOV. 23, I914. 1,1 93,342. Patented Aug. 1,1916.

. 2 SHEETS-SHEET I J- S. BANCROFT & M. C. INDAHL.

CENTERING BAR LOCK FOR TYPE CASTING MACHINES.

. APPLICATION FILED NOV. 23. [914. 1,193,

Patented Aug. 1, 1916.

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J OHN' SELLERS BANCLRO FT AND MAURITZ C. INDAHL, OF P EILADELPI-IIA, PENNSYL- VANIA, ASSIGNQRS TO LANSTON MONOTYPE MACHINE C(')I\LUE"ANY,T1 15 PHILADEL- PHIA, PENNSYLVANIA, A CORPORATION OF VIRGINIA.

Application filed November 23, 1914.

To all whom it may concern Be it known that We, JQHN Snnnnns Banonor'r and MAURITZ C. INDAHL, citizens of the United States, residing at Philadelphia,

in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Centering-Bar Looks for Type-Casting Machines; and we do hereby declare the following to be a fall, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, and to the figures and letters of reference marked thereon. l

This invention relates to type casting machines particularly those employed in the Lanston monotype system of composition and type casting. An example of a casting machine of such character is found in patent to J. S. Bancrofn'No. 625,998, dated May 30, 1899, and in improvements thereon set forth in Patents No. 674,376, dated May 21, 1901, and No. 7%),149, dated January 12, 1904, to which-patents reference may be had for a complete understanding of those fea: tn-res of the casting machine Which it is not deemed necessary to illustrate herein.

The object of the present invention is to provide improved locking mechanism for the die case centering bars Which locking mechanism will permit of the machine being run at a higher speed With-out injury from the hammer like action due to the momentrim of the locking members, and at the same time maintain in the machine that accuracy of positioning which is so necessary for the formation of type to present a uniform and regular appearance characteristic of the highest art of printing.

Referring to the accompanying drawings :-Figure 1 is plan view of a portion of a type casting machine such as that illustrated in the aforesaid Patent No. 625,998, and showing the embodiment of the present improvements therein. Fig. 2 is a sectional elevation substantially on the line 22 of Fig. 1. Fig. 3 is a seetional'el'evation substantially onthe line 3-3- of Fig. I, but omitting some of the parts which are immaterial in so far as the present invention is concerned. Fig. 4 is a section in a horizontal plane through the parts shown ineleva- Specification of Letters Patent.

devices. stantially at right angles to each other and embody slides or looking bars which in the "before mentioned Patent No. (325,998 are designated by the reference number 85.

Patented ring. 1, 1918.

Serial no. 873,583.

1 tion in Fig. 2. Fig. 5 is a section substantially on the line 55 of Fig. 2.

Like reference characters in the several figures indicatethe same parts.

In type casting machines of the character specified the die case is centered'ivith the proper matrices over the mold by av mechanism which embodies in its construction primary and secondary controller or shifting The shifting devices'operate sub- These slides or locking bars are similarly designated in the accompanying drawings by the reference number 85, and inas The said slides or looking bars 85 travel in suitable Ways 'in the frame of the machine, indicated at 86, and are provided With a series of de- -tents or tooth-like projections '87 of tapering formation With which locking bolts are adapted to cooperate through the medium of similarly formed tooth-like projections 88 for giving the finalaccurate adjustment to the slides or locking bars and for holding the latter firmly in locked position during the casting operation and as illustrated in the last above mentioned patent, during the time the primary controlling mechanism is being reset or opened preliminary tothe next adjustment of the die case. The two slides or locking bars move in guideways arranged at substantially right angles to each other and the locking bolts carrying the tooth-like projections or detents 88 are movable transversely of the slidesor locking bars into and out of look ing position. I

The parts carrying-the teeth 88 have been heretofore termed locking bolts, and they Will be similarly designated herein. They are adapted to be simultaneously projected and retracted by means of an operating mechanism which conveniently takes the form of a bell crank lever or levers incliadvance, them.

cated by the reference number 89 in Fig. 1 of the accompanying drawings, pivotally supported. on a fixed stud or axis 90 and adapted to receive motion through the me- --diumof a reciprocatory locking bolt operfor this portion of the machine is as heretofore timed to hold the locking bolts retracted until the slides or looking bars have been preliminarily positioned andto then permit the locking bolts to engage with said slides or looking bars whereby the final accurate adjustment will be effected by reason of the inclined faces of the cooperating teeth or detents, and by reason of the action of the spring 92, said parts will be held in "their locked position until the casting operation has been completed and the die case vis ready to be positioned for a new cast.

The bell crank lever 89 before referred to is preferably a three-armed lever and of skeleton formation, whereby its weight may be materially reduced so as to lessen the effect of inertia and momentum. Two of its arms are at right angles to each other, and adapted for the pivotal connection of the locking bolts, whereby a movement of the leveron its center will move the bolts simultaneously in proper direction to retract or The locking bolts as heretofore constructed have been of practically integral formation in that the momentum of the entire bolt was in each instance overcome by the engagement of the bolt with the locking bar, resulting in a very considerable hammeraction which, because of its injurious effect on the detents, interposed a material limitation in the speed of operation of the machine and subjected the detents to excessive wear and liability of being broken. In accordance with the scheme of the present invention, however, the locking bolts are of sectional formation, provision being made whereby the sections may have a limited movement independently of each other, one section of each bolt being provided with the teeth or detents, and being of relatively light weight and the other section being adapted for pivotal connection with the operating lever. Said sections are extended or heldin extended position with relation to each other by a spring whereby the inertia to be overcome by the engagement of the detents is due solely to the weight of the relatively light section of the bolt and the against the forward end 4 of a yoke member 5. The rear end of the yoke member 5 is adjustably connected with a stem 6 preferably through the medium of an internal sleeve nut 7 andan external locking nut 8, I whereby the yoke may be adjusted on the stem and locked firmly in its adjusted position. Bearing against the end of the stem .6 and extending forwardly into the central .bore of the cylindrical detent member 1 is a plunger member 9 which bears against the rear end of a coil spring 10 located within the detent member, whereby the latter will .be held in its extended position, as shown clearly in Fig. 4. For limiting the rearward movement of the detent member with relation to the body of the locking bolt, a washer collar 11 surrounds the plunger and is held against longitudinal movement with relation to the yoke member 5 by shoulders on the yoke member formed by a recess 12 in which the flange of the washer collar 1 seats. The washer collar may be inserted .or removed, when the plunger is withdrawn, by a movement laterally with respect to the yoke, and the adjustment of the yoke on the stem 6 serves as a means whereby the plunger is given a relative adjustment so as to compress the spring to a greater or less degree as found necessary, it being understood that the outer end of the plunger 9 seats against the end of the stem 6 which latter may be recessed for its reception or the end .of the plunger may simply extend into the sleeve nut 7 before referred to.

Rotation of the detent member 1 with relation to the yoke member is prevented by forming the head 3 with flattened orstraight oppositely disposed edges guided between the proximate faces of the sides of the yoke member, as in Fig. 4 of the drawing.

With this construction it will be readily appreciated that the forward movement of the locking bolt under the influence of its operating lever will bring the detent member into engagement with the detents of the locking bar 85, and the detent member of the bolt will be arrested by such engagement, but the body of the bolt may continue to advance for a limited distance and hence the hammer blow, due to the momentum of the parts will be determined by the weight of the detent member of the bolt alone, plus the pressure exerted by the spring 10. While the spring 10 must have suiiicient power to insure the seating of the cooperating detents and the final accurate positioning and holding of the locking bar, the result is that the destructive hammer blow of the parts is n1aterially less than that which is delivered by a locking bolt of rigid non-sectional construction, or without the capacity for relative movement between parts.

The companion locking bolt, namely, that shown at the right in Fig. 1 and in Fig. 3, is of a somewhat different construction, owing to the factthat in the particular machine shown intervening parts prevent the use of a straight locking bolt. For this reason the forward or detent end 13 of this locking bolt has its intermediate portion at 1% offset upwardly, and at its rear end it is provided with an undercut recess 15 in which is movably mounted the head 16 of the rear end 17 of the locking bolt. The rear end 17 is provided with an internal chamber for the reception of a coil spring 18 adapted at its outer end to bear against the bottom wall of the recess 15, with the result that the detent section 13 of the locking bolt is normally held extended but is permitted a slight independent movement rearwardly which may be determined by the depth of the recess 15, as clearly indicated in Fig. 3. The bolt member 17 is pivotally connected at 19 with the operating lever 89, and the stem 6 of the companion bolt is pivotally connected with the operating lever at 20.

It is unnecessary to make both of the locking bolts adjustable, inasmuch as all of the required adjustments may be effected by having one of said locking bolts adjustable in length in connection with the adjustability of the locking bolt operating rod 91 in its connection with the operating lever 89. The latter adjustment is conveniently etfected by threading the end of the operating rod 91 into a coupling 92, pivotally connected at 93 with the operating lever.

To insure efiective final centering and holding action, the spring 92 is preferably made of suflicient power to more than overcome one of the springs in the locking bolts. Thus, in operation, should one of the locking bolts seat in its locking bar prior to the other, the body of the bolt will be advanced su'lliciently to insure the companion bolt seating in its locking bar, and consequently both of the bolts will invariably be seated to give the resultdesired. It is obvious that it so desired the power of the spring 92 may be made sulticient to advance the bodies of the locking bolts until one or both of them seats firmly against the detent end or ends when the latter are in engagement with the bars, and this may be readily provided for in the movement of the parts, inasmuch as a very limited independent movement of the detent sections of the bolts is all that is necessary to overcome the injurious hammer action due to momentum. I

The construction is one which permits of a ready assembling of the parts and of ready access, should it be necessary or desirable to take the machine down or renew any of the parts which may become worn or injur d in use.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is,

1. In a type casting machine, a locking mechanism for the die case centering devices embodying a detent bar, a sectional locking bolt having relatively light and heavy sections, the forward section being the lighter section which cooperates with the bar, a spring for holding the sections extended with relation to each other, and an operating lever connected with the heavier rear section of the bolt.

2. In a. type casting machine, a locking mechanism for the die case centering devices embodying a detent bar, a locking bolt formed in sections, the forward section be ing provided with detent teeth for cooperation with the bar, a spring interposed between the sections for holding them extended with relation to each other, shoulders for limiting the relative movement of the sections, and an operating lever connected with the rear section for controlling the bodily movements of the bolt.

3. In a type casting machine, locking mechanism for the die case centering de- Vices embodying two detent bars, a sectional locking bolt for each, each of said locking bolts embodying a forward lighter section for cooperation with its bar and a rear heavier section, connections intermediate said sections whereby they are permitted a limited movement with relation to each other, and a spring for holding the sections extended, an operating lever pivotally connected with the rear section of each bolt and a spring of greater strength than either of the bolt-extending springs for advancing said operating lever and moving the bolts into engagement with the detent bars.

i. In a type casting machine, the combination with a plurality of locking bars having detent teeth thereon, a corresponding plurality of locking bolts, each embodying a spring pressed member having teeth thereon for cooperation with the teeth on the locking bars, and means for advancing said locking bolts embodying a spring exerting a pressure sufficient to overcome the resistance of at least one of the spring pressed sections of the locking bolts.

5. In a type casting machine, a locking mechanism for the die case centering devices embodying a plurality of locking bars having detent teeth thereon, a corresponding plurality of locking bolts each embody- "inultaneously advancing said locking bolts embodying a spring exerting a pressure sufiicient to overcome at least the resistance offered by one of the yielding sections of the bolts.

6. In a'type casting machine, a locking mechanism embodying locking bars having detent teeth thereon and a reciprocatory locking bolt embodying a section having detent teeth thereon for cooperation with the teeth on the locking bar, a yoke section in which the detent section is movably mountved, a plunger adjustably mounted in said yoke section, and. a spring interposed be- .tween said plunger and the detent section for advancing the latter with a yielding pressure.

7. In a type casting machine, a locking mechanism embodying a locking bar provided with detent teeth, and a locking bolt having a detent section provided with teethfor cooperation with the teeth of the bar,

a yoke section in which the detent section is movably mounted, stops for limiting the relative movement of the sections, an adjustable plunger, and a spring supported by said plunger for holding the sections in relatively extended position with means for operating the bolt.

8. In a type casting machine, a locking mechanism embodying a locking bolt having at one end a detent section, a yoke section in which said detent section is movably mounted, a removable stop for limiting the relative movement of said sections toward each other, a spring for normally holding said sections in their relatively extended position and a stem adjustably connected with the yoke section.

9. In a type casting machine, a locking mechanism embodying a locking bolt having at its forward end a cylindrical detent section, a yoke section in which said detent section is movably mounted, a removable washer in the yoke section for limiting the movement of the sections toward each other,

a spring confined within the detent section,

a plunger mounted in the yoke section and cooperating with said spring, a stem, and an adjustable connection between said stem and the yoke section, substantially as described.

JOHN SELLERS BANOROFT. MAURITZ C. INDAHL.

Witnesses:

H. G. HOOVER, SAMUEL R. DAVIS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

